i think it would be wise to contact someone above your boss about this. i mean he knows the policies and stuff and it's not his fault that the secretary got it wrong as much as it not your fault.

Explain you Have to ahve these 4 days off, to head office or whatever (i don't know tha structure of the company you work for). how you followed the rules, and you should be entitled to those days now.

I don't know exactly. i mean im just going on what people in the company i work for have done when they have issues.